Honestly my grievances right now are mostly with Broly, Bardock, and of course, Base Goku and Base Vegeta.
Broly is an extremely boring character that essentially equates to the Hulk, has about as much personality as a pissed off block of cheese, and his story is just garbage. To this day I'm still wondering how he got popular in the first place, I'm assuming from sheer spectacle.
Bardock is by no means bad, it's just that he looks so much like Goku, and I was never much a fan of how he fought.
Base Goku and Base Vegeta all I can say is we already had two Gokus (Three if you count Goku Black) and two Vegetas and now we have a grand total of 3 that might not even control that differently, I mean I'd at least accept Goku if he had a power pole move or something.
Everyone else though I'm OK with, despite my initial reaction to Fused Zamasu I'm always fine with more villains and that is an interesting design.